Title:
単一の１次巻線および複数の２次巻線を有する広帯域バラン
Document Type and Number:
Japanese Patent JP5670566
Kind Code:
B2
Abstract:
An RF transmitter capable of transmitting over a wide range of frequencies includes a mixer, a wideband high-Q balun, a first driver amplifier and a second driver amplifier. The balun has a single primary winding and two secondary windings. A differential output of the mixer is coupled to the primary winding. A first of the two secondary windings is coupled to drive the first driver amplifier. A second of the two secondary windings is coupled to drive the second driver amplifier. One driver amplifier is used when transmitting at lower frequencies whereas the other driver amplifier is used when transmitting at higher frequencies. By appropriate sizing of the inductances of the secondary windings and by switching out one of the secondary windings at certain times, the balun is tunable to operate over the wide frequency range while having a high quality factor Q, thereby facilitating reduced power consumption while simultaneously meeting performance requirements.
Inventors:
サンカラナラヤナン、ジャナキラム・ジー．
アスリ、ブシャン・エス．
パニッカス、ビノド・ブイ．
ヤン、ホンヤン
クハトリ、ヒマンシュ
バガット、マウリン
アスリ、ブシャン・エス．
パニッカス、ビノド・ブイ．
ヤン、ホンヤン
クハトリ、ヒマンシュ
バガット、マウリン
Application Number:
JP2013519860A
Publication Date:
February 18, 2015
Filing Date:
July 15, 2011
Export Citation:
Assignee:
クゥアルコム・インコーポレイテッドＱＵＡＬＣＯＭＭ ＩＮＣＯＲＰＯＲＡＴＥＤ
International Classes:
H03H7/42; H01F17/00; H01F27/42; H03H7/48; H04B1/04
Attorney, Agent or Firm:
Masatoshi Kurata
Toshihiro Fukuhara
Makoto Nakamura
Nobuhisa Nogawa
Toshiro Shirane
Peak Takashi
Yukinaga Yasujiro
Naoki Kono
Sunagawa 克
Iseki Mamoru 3
Takao Akaho
Tadashi Inoue
Tatsushi Sato
Okada Kishi
Mihoko Horiuchi
Masanori Takeuchi
Toshihiro Fukuhara
Makoto Nakamura
Nobuhisa Nogawa
Toshiro Shirane
Peak Takashi
Yukinaga Yasujiro
Naoki Kono
Sunagawa 克
Iseki Mamoru 3
Takao Akaho
Tadashi Inoue
Tatsushi Sato
Okada Kishi
Mihoko Horiuchi
Masanori Takeuchi